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A symmetric van der Pauw disk of homogeneous nonmagnetic indium antimonide with an embedded concentric gold inhomogeneity is found to exhibit room-temperature geometric magnetoresistance as high as… (More)
We have conducted extensive high-pressure Raman-scattering studies in order to determine the effects of structure on the vibrational properties of layered aluminosilicate materials. The basal oxygen… (More)
The magnetic properties of vermiculite (V) intercalated with 3d-transition-metal ions (Mn 2+ , Co 2+ , Ni 2+ , and Cu 2+ ) as interlayer cations have been studied by measuring the dc magnetic… (More)
The c-face optical reflectance spectra of the graphite intercalation compounds K(NH/sub 3/)/sub x/C/sub 24/ (x = 0, 1.49, 4.11, and 4.38) have been measured in the photon-energy range 0.5--6 eV.… (More)
The effects of miniband width (Δ), applied electric field, and atomic layering thickness disorder present in real semiconductor superlattices (SL's) have been studied experimentally via transverse… (More)
We have measured time-resolved photoluminescence at low temperature from sodium cyrptand sodide crystals which were preirradiated by intense dye laser pulses. The line shape consists of two… (More)